Wearing ring for rotary elements



WEARING RING Fon ROTARY ELEMENTS Filed Hayle, 192s 2 Sheets-Sheet 2ffvffg l 27 6' l? 'f f sy I 'l l i v ",1/ y 30 ,4 ff H. 2f (4 2f M za129-5' :55-4 v'jgps lrwenfor Patented Aug. 16, 1927.

UNITED sifxrnsA Pa'raia'r l OFFICE.

GEORGE J. wINigLEpor rHrLADELPHIA, DENNsYEvANIA, AssrGNon To THE ERED-ERGKIRON AND sTEELcoMPANY, or FREDERICK, MARYLAND.

I WABING RING FOR IRDIR(` ELEMENTS.

Application area May 16, 1923. serial No. 639,324.

My invention relates to wearing rings for rotary devices where onerotating surface is always subjected to abrasion and 'wear by anadjacent surface. f'

Inorder to clearly illustrate my invention I have described the same inconnection with centrifugal pumps but it will be underst'ood that myinvention is capable of f many other uses.

Centrifugal pumps as 'now constructed are provided with a casing whichcomprises 'a suitable bearing, or bearings, for thev r'e- -volvingimpeller. The casing also comprises a cylindrical surfacel thatiscoaxial withjthe bearings and the impeller has Va threaded end on theintake side thereof upon which a wearing ring is screwed and the outer'surface of saidwearing ring closely approaches 'the cylindrical surfaceformed in the casing in order to prevent leakage from the intake chamberofthe casing to the deliverychamber of the casing.' It has been foundpractically to make coaxial with the shaft of the impellerthe outercylindrical surface of wearing rings that were made to replace theoriginal wearing rings formed uponthe impeller. The replacement wearing`rings would not screw up truly upon the threaded intake side oftheimpeller notwithstanding that all precautions were observed to insureclose workmanship.

As a consequence of this defect, replacement wearing rings couldvnotbemade to have .a suflie-iently close approach to the cylindrical surfaceformed in thecasing `and as a consequence,V considerable leakage eX-istedbetween the `intake chamber of the. cas.

ing and the delivery chamber thereof. Furthermore, by reason of theeccentricity of the outer surface of the replacement wearing ring withreference to the axis of the shaft of the impeller, said ring would attimes touch -the cylindrical `surface of the casing' and cause the ringto unscrew if for any reason the impeller should be inadvertently4turned backwardly'.

Among the objects of my inventionare To s o construct the intake side ofthe im-y pll'er and prende@ Wearng'rng therefor.

. that the cylindricalY surface of the original 'ring mounted uponsaidimpeller and the cylindrical surfaces of any replacement -IlgS thatQHHCl thereonwill b with t* cshaft ofxsaid impeller impossible Toprovide means for preventing axial displacement of the wearing ring withreference to the impeller.

`To provide means for preventing other than a limited circumferentialmovement of the wearing ring with reference to the impeller. To providemeans for locking the wearing ring upon the. impeller Vin bothVdirections circuinferentially so that if the-i`mp eller isinadvertently reversed the ring will not become disengaged therefrom.

To provide locking means for locking the wearing ring with reference totheimpeller in both directions circumferentially,` said vco lockingmeans being soarranged that it will lock saidwearing ring upon saidimpeller firmly in both 'directions and' yet will yield ina directionopposite to that in which it may be locked in order to permit therem'oval of's'aid 'ring from said impeller when a replacement ring istoy beplaced thereon.

These and further objectsy of my invention will be disclosed inthefollowing specifi'cati'on7 referencebeing had to the`accompanyingdrawingand the means by which ly pointed out .in theclaims.

In the drawings Voffay centrifugal pump containing my invention.

Fig. 2 is an enlarged section of the intake 'end' of the' impeller andmy improved wearing ring, the section being taken as along the line '2;2in Fig. l looking in the direction of the arrows.

, Fia

Fig. 2 looking in the direction of the arrows. Fig. 4' is' asecti'on.alo ng theline lf-4 in Fig. 2 looking in the direction of thearrows.

Fig. 5 is a section similar to Fig. 4 but illustratingv the use ofa'roller instead of a ball as a locking mcans. 'f f Figa 6 is aviewsimilar to Fig; 2 but showing a variation in fthe form Aof the grooves.s l' Fig. 7. is afsecti'onalong the line 7-'-7 lin Fig. l6 ilooking inthe direction of the arrows.

that the half ,net shown is a counterpart ai aan shown, v1orepraseafathe 'said obiects are eifec'tuated will be definite-A 3 is aL vsectionalong the line 3 3 in.

which is provided with an intake chamber 11 that is connected in anyapproved manner with a source of the fluid that is to be pumped. Saidcasing is also provided with a bearing shown diagrammatically at 12,which is representative of any approved form of bearing that it may bedesired to use, but whatever bearing is used, the casing is providedwith a cylindrical surface 13 that is coaxial with the bearing. Thesurface 13 may be formed in a removable ring or otherwise, as desired.

14 is the impeller which is fixed upon the shaft 15 and revolved in anysuitable man ner. The impeller terminates in an annular opening` 16which is in communication with the intake chamber 11. The opening 16communicates with the annular opening 17 which forms the delivery sideof the impeller 14 and suitable vanes as 18 are formed inthe impeller inany usual or approved manner for the purpose of forcing the fluid thatis to be pumped. Y

The opening 1'? communicates with the delivery chamber 19 of the casingand the latter is connected in any approved manner to a delivery pipe,not shown.

The impelle-r 14 is provided with a cylindrical surface 20 thatisvcoaXial with the shaft 15 and an annular groove 21 extends inwardlyfrom the surface 20. l

The wearing ring 22 has an interior cylin- `drical surface which litsclosely upon the surface 2O of the impeller 14 and said ring has twoscrews 23-23 threaded therein and provided with cylindrical ends whicheX- tend into the groove 21. The ring 22 is provided with a groove 24that is eccentric to the axis of the shaft 15 and said groove extends,at its maximum depth, from the in ner cylindrical surface of the ring 22to a depth somewhat greater than the diameter of the locking` ball 25.

The mode offassembling the impeller and ring just described is asfollows The ball 25 is placed withinthe groove 24 and the ring 22 isheld in such aA position that the deepest part of the groove 24 will bedownward. In this position the upper surface of the ball 25 will bebelow the inner cylindrical surface of said ringA and, consequently',the ring may be slipped on the cylindrical surface 20 of the impeller14. The screws 253-237are then placed in position with their endsextending into the groove 21 and then the ring 22 is turned in adirection opposite to that in which the impeller is to revolve until theball 25 contacting with the surfaces of the grooves 21 and 24 preventsfurther. motion of said ring with reference to said impeller.

It is to be noted that if the impeller should by any means be turnedinadvertently in the opposite direction to thatin which it normallyrevolves there would be no possibility of the ring 22 becoming displacedfrom the impeller 14 for if the ring 22 is moved in a direct-ionopposite to that just described it will become unlocked and'will againlock when the ball contacts with the eccentric groove 24 near its otherend.

It is to be noted that the screws 23--23V merely insurethat the ring 22will not be axially displaced upon the impeller 14 should the impellerbe reversed and the ring 22 become unlocked, as just described. Y

It .is also to be noted that when the ring is locked in position theball 25 locksethe ring in both directions circumferentially and axially.I Y

In place of the ball 25, I may use the roller 26 as shown in Fig. 5.When Vthe roller is used the groove- 27 is formed fiat at'the bottomthereof instead of curved as shown in Fig. 4. f

In the variation shown in Figs. 6 and 7,

Vthe groove 28 has a depth one-'half the di ameter of the ball 29l andthe groove 30 has a depth slightly more thanpone-half the diameter ofthe ball 29. g

rlhe groove 28 may be formed with a curved bottom as shown in Fig.l 7,if so desired, or with `a fiat' bottom suchvas the groove 21 in Fig. 4.These grooves are made of the depths just noted in order to insure thatshould the ball 29 at any time move to the greatest depth of thegroove'v 30, then the ring 22 could not be axially displaced upon theimpeller 14 notwithstanding that said ring was unlockedcircumferentially With this construction a hole is provided in the ring22 for the insertion of the ball 29 and this hole is closed by the screw31.

' l/Vhile I have shown a ball 29 for use with the structures shown inFigs. 6 and 7, it is tol be understood that a roller 27 may be used ifdesired, the grooves 28 and 30 being shaped to accommodate said roller.

Thus it will `be seen that' I provide a wearing ring that has a plaincylindrical fit upon the impeller and'I consequently insure that theouter wearing surface of a new ring will always be coaxial with the'axisvof the impeller shaft and also insure that the outer cylindricalsurfaces of replacement rings will also be coaxial with said shaft.

ldlhile I have shown and described two forms of carrying out myinvention, it is to be understood that they are merely illustrative andin nowise to limit'the scope of my invention, for changes may bemade inthe Vstructures'shown and describedY without de- 2. In a rotary machine,a bearing, a cylindrical surface co-axial withpsaid bearing, a rotatingelement comprising a shaft revolubly mounted in said bearing, a secondcylindrical surfacel co-axial with said shaft having an annular grooveadjacent one edge of said rotating element, a Wearing ring mounted uponsaid rotating element and closely approaching said co-axial ,cylindricalsurface, and screws threaded in said ring and having theirendsprojecting into the groove in said cylindrical surface to prevent axialdisplacement of said ring uponV said rotating element.

3. In a rotary machine, a bearing, a cylindrical surface co-axial withsaid bearing, a rotating lelement `comprising a shaft revolubly mountedin said bearing, a cylindrical surface co-axial with said shaft havingan annular groove co-axialwith said shaft, a wearing ring havingpagroove eccentric to said shaft mounted upon saidvrotating element andclosely approaching said last named co-axial cylindrical surface, andYrolling locking means mounted in said first named groove and extendinginto said groove in said ring for limiting the circumferentialdisplacement of said ring on said rotating element.

l. In a rotary machine, a bearing, a cylindrical surface co-axial withsaid bearing, a`

rotating element comprising a shaft revolubly mounted in said bearingand a cylindrical surface co-axial with said shaft, a wearing ringmounted on said rotating element and closely approaching Y ,said lastnamed co-axial cylindrical surface, said wearing ring and cylindricalsurface each being grooved and means extending between said grooves forpreventing axial movement and for limiting circumferential displacementof said ring on said rot-ating element.

In a rotary machine, a bearingga cylindrical surface co-axial with saidbearing, a rotating element comprising a shaft revolubly mounted in saidbearing, a cylindrical surface co-axial with said shaft, a ring carriedby said last named cylindrical surf face having an annular grooveeccentric there to, and means extending into said groove for preventingaxial displacement of said ring on said rotating element.

6. In a rotary machine, a bearing, a cylindrical surface co-axial withsaid bearingj a rotating element comprising a shaft revolubly mounted insaid bearing, a cylindrical surface coeaxial with said shaft having anannular groove therein co-axial with said shaft7 a wearing ringcontaining a groove eccentric to said shaft mounted upon said -rotatingelement, and closely approaching said last named co-axial cylindricalsurface, rolling locking means having a radius equal tothe depthof saidirst named groove and positioned between said first named groove and thegroove in said ring to limit dis'- placement of said ring onsaid'rotating element, said ring including screw threaded meansextending into said grooves for locking said ring with respect to saidrotating element.

' 7. A wearing ring for rotatable elements comprising in combinationwith a rotatable element having a circumferential groove adjacent oneend thereof, a Wearing ring adapted to be mounted over the end of saidrotatable element andy having an internal groove arranged to be alignedwith the groove in said rotatable element, a pair of Screw threadedmembers in said wearing ring arranged to be-projected into the groove insaid rotatable element for locking said 8. Awvearing ring' for rotatableelements vcomprising in combination with a rotatable element having acircumferential groove adjacent one end thereof, a wearing ring havinginternal eccentric grooves arranged to be alignedwith thecircumferential groove on saidA rotatable element, screw threadedmembers 'carried in diametrically opposed positions in said wearing ringand arranged to extend into the groove formed in said rotatable element,and locking rollers disposed between the eccentric grooves in saidwearing ring and the circumferential groove in said rotatable elementfor preventing displacement of said wearing ring from said rotatableelement.

In testimony whereof, I aiiix my signature.

GEORGE J. WINKLE.

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